My younger brother is an ISTP. He plays soccer and video games a lot. He also reads a lot those fantasy type books, like Harry Potter and Narnia and what-not (as a joke I just call anything like that "dragon books.") He doesn't "make" conversation, he talks when he wants to, and it's always about stuff he's interested in, a bit less talkative than I am. Seeing my brother not talk around people is just hilarious. He's pretty smart, motivated too. Most of my siblings/cousins are Sensors, which I actually appreciate.